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Sudoku of the Day

NEW

Have you taken a look at our new book shop,
which includes a range of books about sudoku as well as other logic
puzzles.

We have also just reduced the prices of our Easy and Medium level
E-Books.

Statistics

If you would like to keep track of how well you are doing at Sudoku simply
register with us. It's completely free to register and every time
you complete a puzzle whilst logged in, the system records your time.
On the statistics page you can then see your own statistics as well
as the averages of everyone that has signed up. Inside the next few days
we are also planning on including "Top Ten" lists, showing the fastest
players at each level. If you can't see the timer counting up to the
right of the "Print" button, check that you have JavaScript enabled
in your browser.

Using the "Check" button as a means of storing the current state,
so that you can make changes to the puzzle confident that you can use the
back button to take you back to the saved state, is a perfectly legitimate
way of solving the puzzles and can be compared to using a pencil and a rubber
on paper.
However, using the "Check" button to see if you've
guessed an answer correctly, is not. For this reason, if you guess
incorrectly, your time for that puzzle will
not be recorded.

Firefox settings

If you're being annoyed when adding notes to your puzzle by your
browser suggesting values for you, take a look under Tools/Options.
Go to the tab Privacy/Saved Forms and disable "Save information I enter
in forms and the Search Bar". We are still looking for a method to
disable this just when you're on the Sudoku site but until then
maybe this fix will help you.

Sudoku Solver - Solving the hardest puzzles

Our solver uses human logic to solve the daily puzzles, so our single step
help function shows the next easiest square to fill!

SUDO-Q

Now the BBC is getting in on the act, with a show that's a mixture
of Sudoku and a general knowledge quiz. It's
called SUDO-Q.

Origins of Sudoku

Now you've played sudoku of the day online,
aren't you intrigued as to how this
highly addictive puzzle came about. Like many people, I assumed that
sudoku was Japanese, only to discover it was printed in a US magazine
well before it reached Japan. More recently I read an article in a German
newspaper that said that sudoku was invented by a Swiss mathematician,
"Leonhard Euler" and is actually a subset of "Latin Squares".
Enough was enough, now I really had to hunt for a more complete description of
sudoku history and I believe I've found it in
The History of Sudoku.